Apparatus

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sensors Mode-S transponder

A02BAB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N11UQ · AIRBUS HELICOPTERS EC-130 · operated by AIR METHODS LLC

Hex
A02BAB
Octal
50025653
Decimal
10,496,939
Country
US
Tail
N11UQ
Type
EC30
No current signal · last broadcast 5d ago
Flights observed
61
Distinct callsigns
1
Country
US
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S A02BAB.

Country allocation

The ICAO 24-bit address A02BAB falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N11UQ - 61 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-30 N11UQ - Jun 30, 16:15 UTCJun 30, 17:05 UTC50m
2026-06-29 N11UQ - Jun 29, 06:05 UTCJun 29, 06:14 UTC10m
2026-06-29 N11UQ - Jun 29, 04:55 UTCJun 29, 05:20 UTC25m
2026-06-29 N11UQ - Jun 29, 01:20 UTCJun 29, 01:29 UTC10m
2026-06-28 N11UQ - Jun 28, 18:05 UTCJun 28, 18:29 UTC25m
2026-06-28 N11UQ - Jun 28, 15:55 UTCJun 28, 16:29 UTC35m
2026-06-27 N11UQ - Jun 27, 19:39 UTCJun 27, 20:04 UTC25m
2026-06-27 N11UQ - Jun 27, 18:45 UTCJun 27, 19:05 UTC20m
2026-06-26 N11UQ - Jun 26, 08:34 UTCJun 26, 09:30 UTC55m
2026-06-26 N11UQ - Jun 26, 07:14 UTCJun 26, 07:35 UTC20m
2026-06-25 N11UQ - Jun 25, 07:09 UTCJun 25, 07:25 UTC15m
2026-06-25 N11UQ - Jun 25, 06:20 UTCJun 25, 06:35 UTC15m
2026-06-23 N11UQ - Jun 23, 10:24 UTCJun 23, 10:44 UTC20m
2026-06-23 N11UQ - Jun 23, 09:24 UTCJun 23, 09:45 UTC20m
2026-06-23 N11UQ - Jun 23, 01:50 UTCJun 23, 02:04 UTC15m
2026-06-23 N11UQ - Jun 23, 00:54 UTCJun 23, 01:15 UTC20m
2026-06-20 N11UQ - Jun 20, 12:39 UTCJun 20, 12:50 UTC10m
2026-06-20 N11UQ - Jun 20, 11:09 UTCJun 20, 11:25 UTC15m
2026-06-20 N11UQ - Jun 20, 00:49 UTCJun 20, 01:05 UTC15m
2026-06-19 N11UQ - Jun 19, 22:55 UTCJun 19, 23:09 UTC15m
2026-06-16 N11UQ - Jun 16, 22:10 UTCJun 16, 22:25 UTC15m
2026-06-16 N11UQ - Jun 16, 21:15 UTCJun 16, 21:30 UTC15m
2026-06-16 N11UQ - Jun 16, 17:30 UTCJun 16, 17:45 UTC15m
2026-06-16 N11UQ - Jun 16, 16:20 UTCJun 16, 16:35 UTC15m
2026-06-16 N11UQ - Jun 16, 09:15 UTCJun 16, 10:40 UTC1h 25m
2026-06-16 N11UQ - Jun 16, 07:50 UTCJun 16, 08:35 UTC45m
2026-06-16 N11UQ - Jun 16, 04:00 UTCJun 16, 04:15 UTC15m
2026-06-16 N11UQ - Jun 16, 03:00 UTCJun 16, 03:15 UTC15m
2026-06-14 N11UQ - Jun 14, 11:00 UTCJun 14, 11:15 UTC15m
2026-06-14 N11UQ - Jun 14, 10:00 UTCJun 14, 10:15 UTC15m
2026-06-13 N11UQ - Jun 13, 20:20 UTCJun 13, 21:20 UTC1h 0m
2026-06-13 N11UQ - Jun 13, 05:10 UTCJun 13, 05:25 UTC15m
2026-06-13 N11UQ - Jun 13, 04:05 UTCJun 13, 04:20 UTC15m
2026-06-12 N11UQ - Jun 12, 01:05 UTCJun 12, 02:00 UTC55m
2026-06-11 N11UQ - Jun 11, 09:55 UTCJun 11, 10:50 UTC55m
2026-06-10 N11UQ - Jun 10, 05:55 UTCJun 10, 06:10 UTC15m
2026-06-10 N11UQ - Jun 10, 04:20 UTCJun 10, 04:35 UTC15m
2026-06-09 N11UQ - Jun 9, 23:40 UTCJun 10, 00:25 UTC45m
2026-06-09 N11UQ - Jun 9, 22:35 UTCJun 9, 22:55 UTC20m
2026-06-08 N11UQ - Jun 8, 02:10 UTCJun 8, 02:20 UTC10m
2026-06-08 N11UQ - Jun 8, 01:05 UTCJun 8, 01:15 UTC10m
2026-06-06 N11UQ - Jun 6, 14:00 UTCJun 6, 14:40 UTC40m
2026-06-03 N11UQ - Jun 3, 09:25 UTCJun 3, 09:35 UTC10m
2026-06-03 N11UQ - Jun 3, 08:35 UTCJun 3, 08:45 UTC10m
2026-05-31 N11UQ - May 31, 11:00 UTCMay 31, 11:15 UTC15m
2026-05-31 N11UQ - May 31, 09:45 UTCMay 31, 10:00 UTC15m
2026-05-30 N11UQ - May 30, 11:50 UTCMay 30, 12:00 UTC10m
2026-05-30 N11UQ - May 30, 10:55 UTCMay 30, 11:05 UTC10m
2026-05-30 N11UQ - May 30, 02:10 UTCMay 30, 02:20 UTC10m
2026-05-30 N11UQ - May 30, 01:20 UTCMay 30, 01:30 UTC10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N11UQ page for operator, model, and routing details .

Mode-S A02BAB frequently asked

What is Mode-S code A02BAB?
A02BAB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N11UQ.
Where is Mode-S A02BAB registered?
Mode-S code A02BAB is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A02BAB broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A02BAB, octal 50025653, decimal 10,496,939.
What flights does A02BAB operate?
Mode-S A02BAB has broadcast 1 distinct callsign, including N11UQ.